A few years ago, I've designed a low-cost scientific instrument and published all schematics, building instructions and necessary scripts in open source under the Creative Commons Attribution-ShareAlike license (CC BY-SA). By releasing this in open source I wanted to make this type of technology more accessible to others. Since this was published, a few companies contacted me, improved my design (which is great!) and started to sell the improved version as one of their products (which is also fine by me, and allowed by the CC BY-SA license).
- In their advertisements/press releases, some of these companies mentioned that they built their instrument based on an existing design, but don't make any reference to my original design/paper. Is this allowed by the CC BY-SA license? The Creative Commons website clearly states
You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
Would it be appropriate for me to contact these companies and ask them to add reference (links) to my original design?
- The CC BY-SA license indicates that it is fine to modify the design of the original material but that the new product must use the same license as the original. Does it mean that I can ask for all the schematics of their commercial product?